package com.tnovoselec.android.ui.quickaction;

import java.util.ArrayList;
import java.util.List;

import android.content.Context;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.text.TextUtils;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.ImageView;
import android.widget.PopupWindow.OnDismissListener;
import android.widget.RelativeLayout;
import android.widget.ScrollView;
import android.widget.TextView;

import com.tnovoselec.android.ui.R;

/**
 * QuickAction dialog, shows action list as icon and text like the one in
 * Gallery3D app. Currently supports vertical and horizontal layout.
 * 
 * @author Lorensius W. L. T <lorenz@londatiga.net>
 * 
 *         Contributors: - Kevin Peck <kevinwpeck@gmail.com>
 */
public class QuickAction extends PopupWindows implements OnDismissListener {
    private View mRootView;
    private ImageView mArrowUp;
    private ImageView mArrowDown;
    private LayoutInflater mInflater;
    private ViewGroup mTrack;
    private ScrollView mScroller;
    private OnActionItemClickListener mItemClickListener;
    private OnDismissListener mDismissListener;

    private List<ActionItem> actionItems = new ArrayList<ActionItem>();

    private boolean mDidAction;

    private int mChildPos;
    private int mInsertPos;
    private int mAnimStyle;
    private int mOrientation;
    private int rootWidth = 0;

    public static final int HORIZONTAL = 0;
    public static final int VERTICAL = 1;

    public static final int ANIM_GROW_FROM_LEFT = 1;
    public static final int ANIM_GROW_FROM_RIGHT = 2;
    public static final int ANIM_GROW_FROM_CENTER = 3;
    public static final int ANIM_REFLECT = 4;
    public static final int ANIM_AUTO = 5;

    /**
     * Constructor for default vertical layout
     * 
     * @param context
     *            Context
     */
    public QuickAction(Context context) {
	this(context, VERTICAL);
    }

    /**
     * Constructor allowing orientation override
     * 
     * @param context
     *            Context
     * @param orientation
     *            Layout orientation, can be vartical or horizontal
     */
    public QuickAction(Context context, int orientation) {
	super(context);

	mOrientation = orientation;

	mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

	if (mOrientation == HORIZONTAL) {
	    setRootViewId(R.layout.popup_horizontal);
	} else {
	    setRootViewId(R.layout.popup_vertical);
	}

	mAnimStyle = ANIM_AUTO;
	mChildPos = 0;
    }

    /**
     * Get action item at an index
     * 
     * @param index
     *            Index of item (position from callback)
     * 
     * @return Action Item at the position
     */
    public ActionItem getActionItem(int index) {
	return actionItems.get(index);
    }

    /**
     * Set root view.
     * 
     * @param id
     *            Layout resource id
     */
    public void setRootViewId(int id) {
	mRootView = (ViewGroup) mInflater.inflate(id, null);
	mTrack = (ViewGroup) mRootView.findViewById(R.id.tracks);

	mArrowDown = (ImageView) mRootView.findViewById(R.id.arrow_down);
	mArrowUp = (ImageView) mRootView.findViewById(R.id.arrow_up);

	mScroller = (ScrollView) mRootView.findViewById(R.id.scroller);

	// This was previously defined on show() method, moved here to prevent
	// force close that occured
	// when tapping fastly on a view to show quickaction dialog.
	// Thanx to zammbi (github.com/zammbi)
	mRootView.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

	setContentView(mRootView);
    }

    /**
     * Set animation style
     * 
     * @param mAnimStyle
     *            animation style, default is set to ANIM_AUTO
     */
    public void setAnimStyle(int mAnimStyle) {
	this.mAnimStyle = mAnimStyle;
    }

    /**
     * Set listener for action item clicked.
     * 
     * @param listener
     *            Listener
     */
    public void setOnActionItemClickListener(OnActionItemClickListener listener) {
	mItemClickListener = listener;
    }

    /**
     * Add action item
     * 
     * @param action
     *            {@link ActionItem}
     */
    public void addActionItem(ActionItem action) {
	actionItems.add(action);

	String title = action.getTitle();
	Drawable icon = action.getIcon();

	View container;

	if (mOrientation == HORIZONTAL) {
	    container = mInflater.inflate(R.layout.action_item_horizontal, null);
	} else {
	    container = mInflater.inflate(R.layout.action_item_vertical, null);
	}

	ImageView img = (ImageView) container.findViewById(R.id.iv_icon);
	TextView text = (TextView) container.findViewById(R.id.tv_title);

	if (icon != null) {
	    img.setImageDrawable(icon);
	} else {
	    img.setVisibility(View.GONE);
	}

	if (!TextUtils.isEmpty(title)) {
	    text.setText(title);
	} else {
	    text.setVisibility(View.GONE);
	}

	final int pos = mChildPos;
	final int actionId = action.getActionId();

	container.setOnClickListener(new OnClickListener() {
	    @Override
	    public void onClick(View v) {
		if (mItemClickListener != null) {
		    mItemClickListener.onItemClick(QuickAction.this, pos, actionId);
		}

		 if (!getActionItem(pos).isSticky()) {  
         	mDidAction = true;
         	
         	//workaround for transparent background bug
         	//thx to Roman Wozniak <roman.wozniak@gmail.com>
         	v.post(new Runnable() {
                 @Override
                 public void run() {
                     dismiss();
                 }
             });
         }
		}
	});

	container.setFocusable(true);
	container.setClickable(true);

	if (mOrientation == HORIZONTAL && mChildPos != 0) {
	    View separator = mInflater.inflate(R.layout.horiz_separator, null);

	    RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.FILL_PARENT);

	    separator.setLayoutParams(params);
	    separator.setPadding(5, 0, 5, 0);

	    mTrack.addView(separator, mInsertPos);

	    mInsertPos++;
	}

	mTrack.addView(container, mInsertPos);

	mChildPos++;
	mInsertPos++;
    }

    /**
     * Show quickaction popup. Popup is automatically positioned, on top or
     * bottom of anchor view.
     * 
     */
    public void show(View anchor) {
	preShow();

	int xPos, yPos, arrowPos;

	mDidAction = false;

	int[] location = new int[2];

	anchor.getLocationOnScreen(location);

	Rect anchorRect = new Rect(location[0], location[1], location[0] + anchor.getWidth(), location[1] + anchor.getHeight());

	// mRootView.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,
	// LayoutParams.WRAP_CONTENT));

	mRootView.measure(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

	int rootHeight = mRootView.getMeasuredHeight();

	if (rootWidth == 0) {
	    rootWidth = mRootView.getMeasuredWidth();
	}

	int screenWidth = mWindowManager.getDefaultDisplay().getWidth();
	int screenHeight = mWindowManager.getDefaultDisplay().getHeight();

	// automatically get X coord of popup (top left)
	if ((anchorRect.left + rootWidth) > screenWidth) {
	    xPos = anchorRect.left - (rootWidth - anchor.getWidth());
	    xPos = (xPos < 0) ? 0 : xPos;

	    arrowPos = anchorRect.centerX() - xPos;

	} else {
	    if (anchor.getWidth() > rootWidth) {
		xPos = anchorRect.centerX() - (rootWidth / 2);
	    } else {
		xPos = anchorRect.left;
	    }

	    arrowPos = anchorRect.centerX() - xPos;
	}

	int dyTop = anchorRect.top;
	int dyBottom = screenHeight - anchorRect.bottom;

	boolean onTop = (dyTop > dyBottom) ? true : false;

	if (onTop) {
	    if (rootHeight > dyTop) {
		yPos = 15;
		LayoutParams l = mScroller.getLayoutParams();
		l.height = dyTop - anchor.getHeight();
	    } else {
		yPos = anchorRect.top - rootHeight;
	    }
	} else {
	    yPos = anchorRect.bottom;

	    if (rootHeight > dyBottom) {
		LayoutParams l = mScroller.getLayoutParams();
		l.height = dyBottom;
	    }
	}

	showArrow(((onTop) ? R.id.arrow_down : R.id.arrow_up), arrowPos);

	setAnimationStyle(screenWidth, anchorRect.centerX(), onTop);

	mWindow.showAtLocation(anchor, Gravity.NO_GRAVITY, xPos, yPos);
    }

    /**
     * Set animation style
     * 
     * @param screenWidth
     *            screen width
     * @param requestedX
     *            distance from left edge
     * @param onTop
     *            flag to indicate where the popup should be displayed. Set TRUE
     *            if displayed on top of anchor view and vice versa
     */
    private void setAnimationStyle(int screenWidth, int requestedX, boolean onTop) {
	int arrowPos = requestedX - (mArrowUp == null ? 0 : mArrowUp.getMeasuredWidth() / 2);

	switch (mAnimStyle) {
	    case ANIM_GROW_FROM_LEFT:
		mWindow.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Left : R.style.Animations_PopDownMenu_Left);
		break;

	    case ANIM_GROW_FROM_RIGHT:
		mWindow.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Right : R.style.Animations_PopDownMenu_Right);
		break;

	    case ANIM_GROW_FROM_CENTER:
		mWindow.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Center : R.style.Animations_PopDownMenu_Center);
		break;

	    case ANIM_REFLECT:
		mWindow.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Reflect : R.style.Animations_PopDownMenu_Reflect);
		break;

	    case ANIM_AUTO:
		if (arrowPos <= screenWidth / 4) {
		    mWindow.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Left : R.style.Animations_PopDownMenu_Left);
		} else if (arrowPos > screenWidth / 4 && arrowPos < 3 * (screenWidth / 4)) {
		    mWindow.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Center : R.style.Animations_PopDownMenu_Center);
		} else {
		    mWindow.setAnimationStyle((onTop) ? R.style.Animations_PopUpMenu_Right : R.style.Animations_PopDownMenu_Right);
		}

		break;
	}
    }

    /**
     * Show arrow
     * 
     * @param whichArrow
     *            arrow type resource id
     * @param requestedX
     *            distance from left screen
     */
    private void showArrow(int whichArrow, int requestedX) {
	final View showArrow = (whichArrow == R.id.arrow_up) ? mArrowUp : mArrowDown;
	final View hideArrow = (whichArrow == R.id.arrow_up) ? mArrowDown : mArrowUp;

	if (showArrow != null && hideArrow != null) {
	    final int arrowWidth = mArrowUp.getMeasuredWidth();

	    showArrow.setVisibility(View.VISIBLE);

	    ViewGroup.MarginLayoutParams param = (ViewGroup.MarginLayoutParams) showArrow.getLayoutParams();

	    param.leftMargin = requestedX - arrowWidth / 2;

	    hideArrow.setVisibility(View.INVISIBLE);
	}
    }

    /**
     * Set listener for window dismissed. This listener will only be fired if
     * the quicakction dialog is dismissed by clicking outside the dialog or
     * clicking on sticky item.
     */
    public void setOnDismissListener(QuickAction.OnDismissListener listener) {
	setOnDismissListener(this);

	mDismissListener = listener;
    }

    @Override
    public void onDismiss() {
	if (!mDidAction && mDismissListener != null) {
	    mDismissListener.onDismiss();
	}
    }

    /**
     * Listener for item click
     * 
     */
    public interface OnActionItemClickListener {
	public abstract void onItemClick(QuickAction source, int pos, int actionId);
    }

    /**
     * Listener for window dismiss
     * 
     */
    public interface OnDismissListener {
	public abstract void onDismiss();
    }
}